static void
llu_lookup_finish_locks(struct lookup_intent *it, struct pnode *pnode)
{
struct inode *inode;
LASSERT(it);
LASSERT(pnode);
inode = pnode->p_base->pb_ino;
if (it->d.lustre.it_lock_mode && inode != NULL) {
struct llu_sb_info *sbi;
CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%llu/%lu)\n",
inode, (long long)llu_i2stat(inode)->st_ino,
llu_i2info(inode)->lli_st_generation);
sbi = llu_i2sbi(inode);
md_set_lock_data(sbi->ll_md_exp,
&it->d.lustre.it_lock_handle, inode, NULL);
}
/* drop lookup/getattr locks */
if (it->it_op & (IT_LOOKUP | IT_GETATTR))
ll_intent_release(it);
}
void obdo_refresh_inode(struct inode *dst,
struct obdo *src,
obd_flag valid)
{
struct intnl_stat *st = llu_i2stat(dst);
valid &= src->o_valid;
if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
CDEBUG(D_INODE,"valid "LPX64", cur time "CFS_TIME_T"/"CFS_TIME_T
", new %lu/%lu\n",
src->o_valid, LTIME_S(st->st_mtime),
LTIME_S(st->st_ctime),
(long)src->o_mtime, (long)src->o_ctime);
if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(st->st_atime))
LTIME_S(st->st_atime) = src->o_atime;
if (valid & OBD_MD_FLMTIME && src->o_mtime > LTIME_S(st->st_mtime))
LTIME_S(st->st_mtime) = src->o_mtime;
if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(st->st_ctime))
LTIME_S(st->st_ctime) = src->o_ctime;
if (valid & OBD_MD_FLSIZE && src->o_size > st->st_size)
st->st_size = src->o_size;
/* optimum IO size */
if (valid & OBD_MD_FLBLKSZ)
st->st_blksize = src->o_blksize;
/* allocation of space */
if (valid & OBD_MD_FLBLOCKS && src->o_blocks > st->st_blocks)
st->st_blocks = src->o_blocks;
}
int llu_file_release(struct inode *inode)
{
struct ll_file_data *fd;
struct llu_sb_info *sbi = llu_i2sbi(inode);
struct llu_inode_info *lli = llu_i2info(inode);
int rc = 0, rc2;
ENTRY;
CDEBUG(D_VFSTRACE, "VFS Op:inode=%llu/%lu\n",
(long long)llu_i2stat(inode)->st_ino, lli->lli_st_generation);
if (llu_is_root_inode(inode))
RETURN(0);
/* still opened by others? */
if (--lli->lli_open_count)
RETURN(0);
fd = lli->lli_file_data;
if (!fd) /* no process opened the file after an mcreate */
RETURN(0);
rc2 = llu_md_close(sbi->ll_md_exp, inode);
if (rc2 && !rc)
rc = rc2;
RETURN(rc);
}
static void llu_prepare_close(struct inode *inode, struct md_op_data *op_data,
struct ll_file_data *fd)
{
struct obd_client_handle *och = &fd->fd_mds_och;
op_data->op_attr.ia_valid = ATTR_MODE | ATTR_ATIME_SET |
ATTR_MTIME_SET | ATTR_CTIME_SET;
if (fd->fd_flags & FMODE_WRITE) {
struct llu_sb_info *sbi = llu_i2sbi(inode);
if (!(sbi->ll_lco.lco_flags & OBD_CONNECT_SOM) ||
!S_ISREG(llu_i2stat(inode)->st_mode)) {
op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS;
} else {
/* Inode cannot be dirty. Close the epoch. */
op_data->op_flags |= MF_EPOCH_CLOSE;
/* XXX: Send SOM attributes only if they are really
* changed. */
llu_done_writing_attr(inode, op_data);
}
}
llu_pack_inode2opdata(inode, op_data, &och->och_fh);
llu_prep_md_op_data(op_data, inode, NULL, NULL,
0, 0, LUSTRE_OPC_ANY);
}
static int llu_dir_do_readpage(struct inode *inode, struct page *page)
{
struct llu_inode_info *lli = llu_i2info(inode);
struct intnl_stat *st = llu_i2stat(inode);
struct llu_sb_info *sbi = llu_i2sbi(inode);
struct ptlrpc_request *request;
struct lustre_handle lockh;
struct mdt_body *body;
struct lookup_intent it = { .it_op = IT_READDIR };
struct md_op_data op_data = {{ 0 }};
ldlm_policy_data_t policy = { .l_inodebits = { MDS_INODELOCK_UPDATE } };
int rc = 0;
ENTRY;
llu_prep_md_op_data(&op_data, inode, NULL, NULL, 0, 0, LUSTRE_OPC_ANY);
rc = md_lock_match(sbi->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
&lli->lli_fid, LDLM_IBITS, &policy, LCK_CR, &lockh);
if (!rc) {
struct ldlm_enqueue_info einfo = {
.ei_type = LDLM_IBITS,
.ei_mode = LCK_CR,
.ei_cb_bl = llu_md_blocking_ast,
.ei_cb_cp = ldlm_completion_ast,
.ei_cbdata = inode,
};
rc = md_enqueue(sbi->ll_md_exp, &einfo, &it,
&op_data, &lockh, NULL, 0, NULL,
LDLM_FL_CANCEL_ON_BLOCK);
request = (struct ptlrpc_request *)it.d.lustre.it_data;
if (request)
ptlrpc_req_finished(request);
if (rc < 0) {
CERROR("lock enqueue: err: %d\n", rc);
RETURN(rc);
}
}
ldlm_lock_dump_handle(D_OTHER, &lockh);
op_data.op_offset = (__u64)hash_x_index(page->index, 0);
op_data.op_npages = 1;
rc = md_readpage(sbi->ll_md_exp, &op_data, &page, &request);
if (!rc) {
body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
LASSERT(body != NULL); /* checked by md_readpage() */
if (body->valid & OBD_MD_FLSIZE)
st->st_size = body->size;
} else {
CERROR("read_dir_page(%ld) error %d\n", page->index, rc);
}
ptlrpc_req_finished(request);
EXIT;
ldlm_lock_decref(&lockh, LCK_CR);
return rc;
}
static int slp_attr_get(const struct lu_env *env, struct cl_object *obj,
struct cl_attr *attr)
{
struct inode *inode = ccc_object_inode(obj);
struct intnl_stat *st = llu_i2stat(inode);
attr->cat_size = st->st_size;
attr->cat_blocks = st->st_blocks;
attr->cat_mtime = st->st_mtime;
attr->cat_atime = st->st_atime;
attr->cat_ctime = st->st_ctime;
/* KMS is not known by this layer */
return 0; /* layers below have to fill in the rest */
}
static int slp_object_print(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *o)
{
struct ccc_object *obj = lu2ccc(o);
struct inode *inode = obj->cob_inode;
struct intnl_stat *st = NULL;
if (inode)
st = llu_i2stat(inode);
return (*p)(env, cookie, LUSTRE_SLP_NAME"-object@%p(%p:%lu/%u)",
obj, inode,
st ? (unsigned long)st->st_ino : 0UL,
inode ? (unsigned int)llu_i2info(inode)->lli_st_generation
: 0);
}
int llu_md_close(struct obd_export *md_exp, struct inode *inode)
{
struct llu_inode_info *lli = llu_i2info(inode);
struct ll_file_data *fd = lli->lli_file_data;
struct ptlrpc_request *req = NULL;
struct obd_client_handle *och = &fd->fd_mds_och;
struct intnl_stat *st = llu_i2stat(inode);
struct md_op_data op_data = { { 0 } };
int rc;
ENTRY;
/* clear group lock, if present */
if (fd->fd_flags & LL_FILE_GROUP_LOCKED)
llu_put_grouplock(inode, fd->fd_grouplock.cg_gid);
llu_prepare_close(inode, &op_data, fd);
rc = md_close(md_exp, &op_data, och->och_mod, &req);
if (rc == -EAGAIN) {
/* We are the last writer, so the MDS has instructed us to get
* the file size and any write cookies, then close again. */
LASSERT(lli->lli_open_flags & FMODE_WRITE);
rc = llu_som_update(inode, &op_data);
if (rc) {
CERROR("inode %llu mdc Size-on-MDS update failed: "
"rc = %d\n", (long long)st->st_ino, rc);
rc = 0;
}
} else if (rc) {
CERROR("inode %llu close failed: rc %d\n",
(long long)st->st_ino, rc);
} else {
rc = llu_objects_destroy(req, inode);
if (rc)
CERROR("inode %llu ll_objects destroy: rc = %d\n",
(long long)st->st_ino, rc);
}
md_clear_open_replay_data(md_exp, och);
ptlrpc_req_finished(req);
och->och_fh.cookie = DEAD_HANDLE_MAGIC;
lli->lli_file_data = NULL;
OBD_FREE(fd, sizeof(*fd));
RETURN(rc);
}
void llu_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
struct lustre_handle *fh)
{
struct llu_inode_info *lli = llu_i2info(inode);
struct intnl_stat *st = llu_i2stat(inode);
ENTRY;
op_data->op_fid1 = lli->lli_fid;
op_data->op_attr.ia_atime = st->st_atime;
op_data->op_attr.ia_mtime = st->st_mtime;
op_data->op_attr.ia_ctime = st->st_ctime;
op_data->op_attr.ia_size = st->st_size;
op_data->op_attr_blocks = st->st_blocks;
op_data->op_attr.ia_attr_flags = lli->lli_st_flags;
op_data->op_ioepoch = lli->lli_ioepoch;
if (fh)
op_data->op_handle = *fh;
EXIT;
}
/** Cliens updates SOM attributes on MDS: obd_getattr and md_setattr. */
int llu_som_update(struct inode *inode, struct md_op_data *op_data)
{
struct llu_inode_info *lli = llu_i2info(inode);
struct llu_sb_info *sbi = llu_i2sbi(inode);
struct obdo oa = { 0 };
__u32 old_flags;
int rc;
ENTRY;
LASSERT(!(lli->lli_flags & LLIF_MDS_SIZE_LOCK));
LASSERT(sbi->ll_lco.lco_flags & OBD_CONNECT_SOM);
old_flags = op_data->op_flags;
op_data->op_flags = MF_SOM_CHANGE;
/* If inode is already in another epoch, skip getattr from OSTs. */
if (lli->lli_ioepoch == op_data->op_ioepoch) {
rc = llu_inode_getattr(inode, &oa, op_data->op_ioepoch,
old_flags & MF_GETATTR_LOCK);
if (rc) {
oa.o_valid = 0;
if (rc == -ENOENT)
CDEBUG(D_INODE, "objid "LPX64" is destroyed\n",
lli->lli_smd->lsm_object_id);
else
CERROR("inode_getattr failed (%d): unable to "
"send a Size-on-MDS attribute update "
"for inode %llu/%lu\n", rc,
(long long)llu_i2stat(inode)->st_ino,
lli->lli_st_generation);
} else {
CDEBUG(D_INODE, "Size-on-MDS update on "DFID"\n",
PFID(&lli->lli_fid));
}
/* Install attributes into op_data. */
md_from_obdo(op_data, &oa, oa.o_valid);
}
rc = llu_md_setattr(inode, op_data, NULL);
RETURN(rc);
}
static int lookup_it_finish(struct ptlrpc_request *request, int offset,
struct lookup_intent *it,
struct inode *parent, struct pnode *child)
{
struct llu_sb_info *sbi = llu_i2sbi(parent);
struct inode *inode = NULL;
int rc;
/* libsysio require us generate inode right away if success.
* so if mds created new inode for us we need make sure it
* succeeded. thus for any error we can't delay to the
* llu_file_open() time. */
if (it_disposition(it, DISP_OPEN_CREATE) &&
it_open_error(DISP_OPEN_CREATE, it)) {
CDEBUG(D_INODE, "detect mds create error\n");
return it_open_error(DISP_OPEN_CREATE, it);
}
if (it_disposition(it, DISP_OPEN_OPEN) &&
it_open_error(DISP_OPEN_OPEN, it)) {
CDEBUG(D_INODE, "detect mds open error\n");
/* undo which did by md_intent_lock */
if (it_disposition(it, DISP_OPEN_CREATE) &&
!it_open_error(DISP_OPEN_CREATE, it)) {
LASSERT(request);
LASSERT(atomic_read(&request->rq_refcount) > 1);
CDEBUG(D_INODE, "dec a ref of req %p\n", request);
ptlrpc_req_finished(request);
}
return it_open_error(DISP_OPEN_OPEN, it);
}
/* NB 1 request reference will be taken away by ll_intent_lock()
* when I return
*/
if (!it_disposition(it, DISP_LOOKUP_NEG) || (it->it_op & IT_CREAT)) {
struct lustre_md md;
struct llu_inode_info *lli;
struct intnl_stat *st;
ENTRY;
if (it_disposition(it, DISP_OPEN_CREATE))
ptlrpc_req_finished(request);
rc = md_get_lustre_md(sbi->ll_md_exp, request,
sbi->ll_dt_exp, sbi->ll_md_exp, &md);
if (rc)
RETURN(rc);
inode = llu_iget(parent->i_fs, &md);
if (!inode || IS_ERR(inode)) {
/* free the lsm if we allocated one above */
if (md.lsm != NULL)
obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
RETURN(inode ? PTR_ERR(inode) : -ENOMEM);
} else if (md.lsm != NULL) {
obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
}
lli = llu_i2info(inode);
st = llu_i2stat(inode);
/* If this is a stat, get the authoritative file size */
if (it->it_op == IT_GETATTR && S_ISREG(st->st_mode) &&
lli->lli_has_smd) {
ldlm_error_t rc;
/* bug 2334: drop MDS lock before acquiring OST lock */
ll_intent_drop_lock(it);
rc = cl_glimpse_size(inode);
if (rc) {
I_RELE(inode);
RETURN(rc);
}
}
} else {
ENTRY;
}
/* intent will be further used in cases of open()/getattr() */
if (inode && (it->it_op & IT_OPEN))
LL_SAVE_INTENT(inode, it);
child->p_base->pb_ino = inode;
RETURN(0);
}
static int llu_pb_revalidate(struct pnode *pnode, int flags,
struct lookup_intent *it)
{
struct pnode_base *pb = pnode->p_base;
struct md_op_data op_data = {{ 0 }};
struct ptlrpc_request *req = NULL;
struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
struct obd_export *exp;
int rc;
ENTRY;
CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,intent=%x\n",
(int)pb->pb_name.len, pb->pb_name.name, it ? it->it_op : 0);
/* We don't want to cache negative dentries, so return 0 immediately.
* We believe that this is safe, that negative dentries cannot be
* pinned by someone else */
if (pb->pb_ino == NULL) {
CDEBUG(D_INODE, "negative pb\n");
RETURN(0);
}
/* This is due to bad interaction with libsysio. remove this when we
* switched to libbsdio XXX
*/
{
struct llu_inode_info *lli = llu_i2info(pb->pb_ino);
struct intnl_stat *st = llu_i2stat(pb->pb_ino);
if (lli->lli_it) {
CDEBUG(D_INODE, "inode %llu still have intent "
"%p(opc 0x%x), release it\n",
(long long) st->st_ino, lli->lli_it,
lli->lli_it->it_op);
ll_intent_release(lli->lli_it);
OBD_FREE(lli->lli_it, sizeof(*lli->lli_it));
lli->lli_it = NULL;
}
}
exp = llu_i2mdexp(pb->pb_ino);
if (!it) {
it = &lookup_it;
it->it_op_release = ll_intent_release;
}
llu_prep_md_op_data(&op_data, pnode->p_parent->p_base->pb_ino,
pb->pb_ino, pb->pb_name.name, pb->pb_name.len,
0, LUSTRE_OPC_ANY);
rc = md_intent_lock(exp, &op_data, NULL, 0, it, flags,
&req, llu_md_blocking_ast,
LDLM_FL_CANCEL_ON_BLOCK);
/* If req is NULL, then md_intent_lock only tried to do a lock match;
* if all was well, it will return 1 if it found locks, 0 otherwise. */
if (req == NULL && rc >= 0)
GOTO(out, rc);
if (rc < 0)
GOTO(out, rc = 0);
rc = pnode_revalidate_finish(req, it, pnode);
if (rc != 0) {
ll_intent_release(it);
GOTO(out, rc = 0);
}
rc = 1;
/* Note: ll_intent_lock may cause a callback, check this! */
if (it->it_op & IT_OPEN)
LL_SAVE_INTENT(pb->pb_ino, it);
out:
if (req && rc == 1)
ptlrpc_req_finished(req);
if (rc == 0) {
LASSERT(pb->pb_ino);
I_RELE(pb->pb_ino);
pb->pb_ino = NULL;
} else {
llu_lookup_finish_locks(it, pnode);
}
RETURN(rc);
}
int llu_md_blocking_ast(struct ldlm_lock *lock,
struct ldlm_lock_desc *desc,
void *data, int flag)
{
struct lustre_handle lockh;
int rc;
ENTRY;
switch (flag) {
case LDLM_CB_BLOCKING:
ldlm_lock2handle(lock, &lockh);
rc = ldlm_cli_cancel(&lockh, 0);
if (rc < 0) {
CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
RETURN(rc);
}
break;
case LDLM_CB_CANCELING: {
struct inode *inode = llu_inode_from_resource_lock(lock);
struct llu_inode_info *lli;
struct intnl_stat *st;
__u64 bits = lock->l_policy_data.l_inodebits.bits;
struct lu_fid *fid;
/* Inode is set to lock->l_resource->lr_lvb_inode
* for mdc - bug 24555 */
LASSERT(lock->l_ast_data == NULL);
/* Invalidate all dentries associated with this inode */
if (inode == NULL)
break;
lli = llu_i2info(inode);
st = llu_i2stat(inode);
if (bits & MDS_INODELOCK_UPDATE)
lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
fid = &lli->lli_fid;
if (!fid_res_name_eq(fid, &lock->l_resource->lr_name))
LDLM_ERROR(lock, "data mismatch with object "
DFID" (%p)", PFID(fid), inode);
if (S_ISDIR(st->st_mode) &&
(bits & MDS_INODELOCK_UPDATE)) {
CDEBUG(D_INODE, "invalidating inode %llu\n",
(long long)st->st_ino);
llu_invalidate_inode_pages(inode);
}
/*
if (inode->i_sb->s_root &&
inode != inode->i_sb->s_root->d_inode)
ll_unhash_aliases(inode);
*/
I_RELE(inode);
break;
}
default:
LBUG();
}
RETURN(0);
}
ssize_t llu_iop_filldirentries(struct inode *dir, _SYSIO_OFF_T *basep,
char *buf, size_t nbytes)
{
struct llu_inode_info *lli = llu_i2info(dir);
struct intnl_stat *st = llu_i2stat(dir);
loff_t pos = *basep;
struct ll_dir_chain chain;
struct page *page;
int filled = 0;
int rc;
int done;
__u16 type;
ENTRY;
liblustre_wait_event(0);
if (st->st_size == 0) {
CWARN("dir size is 0?\n");
RETURN(0);
}
if (pos == MDS_DIR_END_OFF)
/*
* end-of-file.
*/
RETURN(0);
rc = 0;
done = 0;
ll_dir_chain_init(&chain);
page = llu_dir_read_page(dir, pos, 0, &chain);
while (rc == 0 && !done) {
struct lu_dirpage *dp;
struct lu_dirent *ent;
if (!IS_ERR(page)) {
/*
* If page is empty (end of directoryis reached),
* use this value.
*/
__u64 hash = MDS_DIR_END_OFF;
__u64 next;
dp = page->addr;
for (ent = lu_dirent_start(dp); ent != NULL && !done;
ent = lu_dirent_next(ent)) {
char *name;
int namelen;
struct lu_fid fid;
__u64 ino;
hash = le64_to_cpu(ent->lde_hash);
namelen = le16_to_cpu(ent->lde_namelen);
if (hash < pos)
/*
* Skip until we find target hash
* value.
*/
continue;
if (namelen == 0)
/*
* Skip dummy record.
*/
continue;
fid = ent->lde_fid;
name = ent->lde_name;
fid_le_to_cpu(&fid, &fid);
ino = cl_fid_build_ino(&fid, 0);
type = ll_dirent_type_get(ent);
done = filldir(buf, nbytes, name, namelen,
(loff_t)hash, ino, type,
&filled);
}
next = le64_to_cpu(dp->ldp_hash_end);
OBD_PAGE_FREE(page);
if (!done) {
pos = next;
if (pos == MDS_DIR_END_OFF)
/*
* End of directory reached.
*/
done = 1;
else if (1 /* chain is exhausted*/)
/*
* Normal case: continue to the next
* page.
*/
page = llu_dir_read_page(dir, pos, 1,
&chain);
else {
/*
* go into overflow page.
*/
}
} else {
pos = hash;
if (filled == 0)
GOTO(out, filled = -EINVAL);
}
} else {
rc = PTR_ERR(page);
CERROR("error reading dir "DFID" at %lu: rc %d\n",
PFID(&lli->lli_fid), (unsigned long)pos, rc);
}
}
lli->lli_dir_pos = (loff_t)pos;
*basep = lli->lli_dir_pos;
out:
ll_dir_chain_fini(&chain);
liblustre_wait_event(0);
RETURN(filled);
}
static int slp_io_start(const struct lu_env *env, const struct cl_io_slice *ios)
{
struct ccc_io *cio = cl2ccc_io(env, ios);
struct cl_io *io = ios->cis_io;
struct cl_object *obj = io->ci_obj;
struct inode *inode = ccc_object_inode(obj);
int err, ret;
loff_t pos;
long cnt;
struct llu_io_group *iogroup;
struct lustre_rw_params p = {0};
int iovidx;
struct intnl_stat *st = llu_i2stat(inode);
struct llu_inode_info *lli = llu_i2info(inode);
struct llu_io_session *session = cl2slp_io(env, ios)->sio_session;
int write = io->ci_type == CIT_WRITE;
int exceed = 0;
CLOBINVRNT(env, obj, ccc_object_invariant(obj));
if (write) {
pos = io->u.ci_wr.wr.crw_pos;
cnt = io->u.ci_wr.wr.crw_count;
} else {
pos = io->u.ci_rd.rd.crw_pos;
cnt = io->u.ci_rd.rd.crw_count;
}
if (io->u.ci_wr.wr_append) {
p.lrp_lock_mode = LCK_PW;
} else {
p.lrp_brw_flags = OBD_BRW_SRVLOCK;
p.lrp_lock_mode = LCK_NL;
}
iogroup = get_io_group(inode, max_io_pages(cnt, cio->cui_nrsegs), &p);
if (IS_ERR(iogroup))
RETURN(PTR_ERR(iogroup));
err = ccc_prep_size(env, obj, io, pos, cnt, &exceed);
if (err != 0 || (write == 0 && exceed != 0))
GOTO(out, err);
CDEBUG(D_INODE,
"%s ino %lu, %lu bytes, offset "LPU64", i_size "LPU64"\n",
write ? "Write" : "Read", (unsigned long)st->st_ino,
cnt, (__u64)pos, (__u64)st->st_size);
if (write && io->u.ci_wr.wr_append)
pos = io->u.ci_wr.wr.crw_pos = st->st_size; /* XXX? Do we need to change io content too here? */
/* XXX What about if one write syscall writes at 2 different offsets? */
for (iovidx = 0; iovidx < cio->cui_nrsegs; iovidx++) {
char *buf = (char *) cio->cui_iov[iovidx].iov_base;
long count = cio->cui_iov[iovidx].iov_len;
if (!count)
continue;
if (cnt < count)
count = cnt;
if (IS_BAD_PTR(buf) || IS_BAD_PTR(buf + count)) {
GOTO(out, err = -EFAULT);
}
if (io->ci_type == CIT_READ) {
if (/* local_lock && */ pos >= st->st_size)
break;
} else if (io->ci_type == CIT_WRITE) {
if (pos >= lli->lli_maxbytes) {
GOTO(out, err = -EFBIG);
}
if (pos + count >= lli->lli_maxbytes)
count = lli->lli_maxbytes - pos;
} else {
LBUG();
}
ret = llu_queue_pio(env, io, iogroup, buf, count, pos);
if (ret < 0) {
GOTO(out, err = ret);
} else {
io->ci_nob += ret;
pos += ret;
cnt -= ret;
if (io->ci_type == CIT_WRITE) {
// obd_adjust_kms(exp, lsm, pos, 0); // XXX
if (pos > st->st_size)
st->st_size = pos;
}
if (!cnt)
break;
}
}
LASSERT(cnt == 0 || io->ci_type == CIT_READ); /* libsysio should guarantee this */
if (!iogroup->lig_rc)
session->lis_rwcount += iogroup->lig_rwcount;
else if (!session->lis_rc)
session->lis_rc = iogroup->lig_rc;
err = 0;
out:
put_io_group(iogroup);
return err;
}
static int llu_queue_pio(const struct lu_env *env, struct cl_io *io,
struct llu_io_group *group,
char *buf, size_t count, loff_t pos)
{
struct cl_object *obj = io->ci_obj;
struct inode *inode = ccc_object_inode(obj);
struct intnl_stat *st = llu_i2stat(inode);
struct obd_export *exp = llu_i2obdexp(inode);
struct page *page;
int rc = 0, ret_bytes = 0;
struct cl_page *clp;
struct cl_2queue *queue;
ENTRY;
if (!exp)
RETURN(-EINVAL);
queue = &io->ci_queue;
cl_2queue_init(queue);
/* prepare the pages array */
do {
unsigned long index, offset, bytes;
offset = (pos & ~CFS_PAGE_MASK);
index = pos >> PAGE_CACHE_SHIFT;
bytes = PAGE_CACHE_SIZE - offset;
if (bytes > count)
bytes = count;
/* prevent read beyond file range */
if (/* local_lock && */
io->ci_type == CIT_READ && pos + bytes >= st->st_size) {
if (pos >= st->st_size)
break;
bytes = st->st_size - pos;
}
/* prepare page for this index */
page = llu_get_user_page(index, buf - offset, offset, bytes);
if (!page) {
rc = -ENOMEM;
break;
}
clp = cl_page_find(env, obj,
cl_index(obj, pos),
page, CPT_TRANSIENT);
if (IS_ERR(clp)) {
rc = PTR_ERR(clp);
break;
}
rc = cl_page_own(env, io, clp);
if (rc) {
LASSERT(clp->cp_state == CPS_FREEING);
cl_page_put(env, clp);
break;
}
cl_2queue_add(queue, clp);
/* drop the reference count for cl_page_find, so that the page
* will be freed in cl_2queue_fini. */
cl_page_put(env, clp);
cl_page_clip(env, clp, offset, offset+bytes);
count -= bytes;
pos += bytes;
buf += bytes;
group->lig_rwcount += bytes;
ret_bytes += bytes;
page++;
} while (count);
if (rc == 0) {
enum cl_req_type iot;
iot = io->ci_type == CIT_READ ? CRT_READ : CRT_WRITE;
rc = cl_io_submit_sync(env, io, iot, queue, 0);
}
group->lig_rc = rc;
cl_2queue_discard(env, io, queue);
cl_2queue_disown(env, io, queue);
cl_2queue_fini(env, queue);
RETURN(ret_bytes);
}
int llu_iop_open(struct pnode *pnode, int flags, mode_t mode)
{
struct inode *inode = pnode->p_base->pb_ino;
struct llu_inode_info *lli = llu_i2info(inode);
struct intnl_stat *st = llu_i2stat(inode);
struct ll_file_data *fd;
struct ptlrpc_request *request;
struct lookup_intent *it;
struct lov_stripe_md *lsm;
int rc = 0;
ENTRY;
liblustre_wait_event(0);
/* don't do anything for '/' */
if (llu_is_root_inode(inode))
RETURN(0);
CDEBUG(D_VFSTRACE, "VFS Op:inode=%llu\n", (long long)st->st_ino);
LL_GET_INTENT(inode, it);
if (!it->d.lustre.it_disposition) {
LBUG();
}
rc = it_open_error(DISP_OPEN_OPEN, it);
if (rc)
GOTO(out_release, rc);
rc = llu_local_open(lli, it);
if (rc)
LBUG();
if (!S_ISREG(st->st_mode))
GOTO(out_release, rc = 0);
fd = lli->lli_file_data;
lsm = lli->lli_smd;
if (lsm)
flags &= ~O_LOV_DELAY_CREATE;
/*XXX: open_flags are overwritten and the previous ones are lost */
lli->lli_open_flags = flags & ~(O_CREAT | O_EXCL | O_TRUNC);
out_release:
request = it->d.lustre.it_data;
ptlrpc_req_finished(request);
it->it_op_release(it);
OBD_FREE(it, sizeof(*it));
/* libsysio hasn't done anything for O_TRUNC. here we
* simply simulate it as open(...); truncate(...); */
if (rc == 0 && (flags & O_TRUNC) && S_ISREG(st->st_mode)) {
struct iattr attr;
memset(&attr, 0, sizeof(attr));
attr.ia_size = 0;
attr.ia_valid |= ATTR_SIZE | ATTR_RAW;
rc = llu_setattr_raw(inode, &attr);
if (rc)
CERROR("error %d truncate in open()\n", rc);
}
liblustre_wait_event(0);
RETURN(rc);
}
